Air compressor



FIG. 1 is a top, rear, right perspective view of my new design for an air compressor;

FIG. 2 is a top, front, left perspective view thereof;

FIG. 3 is an elevated front view thereof;

FIG. 4 is an elevated right view thereof;

FIG. 5 is an elevated left view thereof;

FIG. 6 is an elevated rear view thereof;

FIG. 7 is a top plan view thereof; and

FIG. 8 is a bottom plan view thereof. 

CLAIM I claim the ornamental design for an air compressor, as shown and described. 